एपीए उद्धरण

Aboul-Kassim, T. A. T. (2001). The Natural environment and the biogeochemical cycles. Berlin ; New York: Springer-Verlag.

शिकागो स्टाइल उद्धरण

Aboul-Kassim, Tarek A. T. The Natural Environment and the Biogeochemical Cycles. Berlin ; New York: Springer-Verlag, 2001.

एमएलए उद्धरण

Aboul-Kassim, Tarek A. T. The Natural Environment and the Biogeochemical Cycles. Berlin ; New York: Springer-Verlag, 2001.